22-NA-079

Service Bulletin
Bulletin No.:
22-NA-079
Date:
April, 2023
TECHNICAL
Subject:
Poor Engine Performance in Extremely Cold Weather Conditions for LSY Engines,
Charge Air Cooler Icing, Malfunction Indicator Lamp (MIL) Illuminated with P0299
Brand:
Model:
Buick
Envision
Model Year:
from
to
2021
2023
VIN:
from
Engine:
Transmission:
to
LSY
Involved Region or Country
North America
Additional Options (RPOs)
Equipped with LSY Engines only
Condition
Some customers may comment on one or more of the following conditions when driving
in extremely cold weather conditions (-18°C or less / 0°F or less):
• Loss of power
• Hesitation on acceleration
• Stalling condition
• Malfunction Indicator Lamp illuminated P0299
Cause
This condition may be caused by ice accumulation in the charge air cooler (CAC),
restricting air flow.
Correction
6029252
A winter grille cover has been released to address this issue.
Copyright 2023 General Motors LLC. All Rights Reserved.
Page 2
April, 2023
Service Procedure
Important: Service agents must comply with all
International, Federal, State, Provincial, and/or
Local laws applicable to the activities it performs
under this bulletin, including but not limited to
handling, deploying, preparing, classifying,
packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between
the procedures set forth in this bulletin and the
laws that apply to your dealership, you must follow
those applicable laws.
Instructions for installation are included with the grille
cover.
The cover can be installed by the technician initially but
the technician needs to educate the customer on the
removal process after the winter season ends and how
the customer will reinstall the cover the following winter
season.
One time installation of the winter grille cover is
covered under warranty. This can be installed and
charged to the unique labor operation code provided in
this bulletin.
Bulletin No.: 22-NA-079
Important: The winter grille cover should be installed
in extreme cold weather and removed when the winter
season changes.
Important: Additional covers and repeat
installation are customer pay.
Important: Refer to #PIP5540J: Diagnostic Tip: Poor
Engine Performance Or CEL On In Cold Ambient
Temperatures On Vehicles Equipped With
Turbocharged Gasoline Engines May Set One Or More
Of The Following DTCs P0299 P2227 for additional
service information on cleaning the CAC prior to winter
grille cover installation.
Note: Clean the surface before installing the winter
grille cover.
Parts Information
Causal
Part
Description
Part
Number
Qty
X
COVER PKGFRT GRL OPG
85513002
1
Warranty Information
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information.
Labor Operation
Description
Labor Time
2086448*
One Time Installation of Grille Cover
0.2 hr
*This is a unique Labor Operation for Bulletin use only.
Version
2
Modified
Release April 06, 2022
Revised April 13, 2023 — Added the 2023 Model Year and Important Statement.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
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